| 摘要 |
<p>A power controller for an electronic apparatus including an electrophotographic copying machine is provided for automatically prohibiting power supply to parts of the apparatus in response to the reduction of a light-shining amount, e.g., a decrease in the light surrounding the apparatus. The power controller includes a photosensitive element, a comparator, a delay circuit, a gate, and a relay. The photosensitive element serves to provide a voltage in accordance with the surrounding brightness.</p> |
